Car-wheel-rolling mill.



No. 664,799. Patented Dec. 25, I900. F. A. WHEELER.

CAR WHEEL ROLLING MILL.

iApplicatiOn filed Nov. 15, 1699.)

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[Application med mv. 15, 1899.)

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No. 664,799. Patented Dec. 25, I900. F. A. WHEELER.-

CAR WHEEL ROLLING MILL.

(Application filed. Nov. 15, 1899.) (No Model.) [5 Sheets-Sheet 3,

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No. 664,799. Patented Dec. 25,1900. F. A. WHEELER.

CAR WHEEL ROLLING HILL.

(Application filed Nov. 15, 1899.) (No Model.) l5 Sheets-Sheet 4 INVENTOR W ATTORNEYS.

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No. 664,799; Patented Dec. 25, I900. F. A. WHEELER.

CAR WHEEL ROLUNG HILL. (Appiication filed ivov. 15, 1899.,

(N0 Moflel.) 15 Sheets-Sheet 5.

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m1. 664,799. Pa tented Dec. 25, 1900.?

F. A. WHEELER. CAB WHEEL RDLLING MILL.

{Application filed Nov. 15, 1899.]

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No. 664,799. Patented Dec. 25, I900.

F. A. WHEELER.

GAB WHEEL ROLLING HILL.

(Application filed Nov. 15, 1899.) (No Model.) l5 Shaqts$heat 7.

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CAR WHEEL ROLLING MILL.

Patented Dec. 25, I900.

[Application filed Nov. 15, 1899.)

i5 Sheds-Sheet 8 (No Model.)

WITNESSES ATTORNEYS.

No. 664,799. Patented Dec. 25, 1900.

F. A. WHEELER.

GAB WHEEL ROLLING HILL.

(Application filed Nov. 15, 1899.) (Hn Model.) I5 Sheets-Sheet 9.

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Patented Dec. 25, 1900.

F. A. WHEELER.

CAB WHEEL RDLLING MILL.

(Applicatibn filed Nov. 15, 1899.)

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- No. 664,799. Patented Dec. 25, 1900.

F. A. WHEELER.

CAR WHEEL ROLLING MILL.

Application filed Nov. 15, 1899.] (No Model.) 5 Sheets-Sheet II.

108 6 7 47 10a a? 111mm I R TORNEYS.

No. 664,799. .Patented Dec. 25, I900. F. A. WHEELER.

CAR WHEEL ROLLING MILL.

(Application filed Nov. 15, 1899.)

l5 Sheets-Sheet l2.

(No Model.)

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No. 664,799. Patanted Dec'. 25, [900.

F. A. WHEELER.

'CAR WHEEL ROLLING MILL.

(Application filed mi. 15, 1899.)

I5 Sheets-Sheet l3.

(M n-Model.)

m M E WITNESSES ATTORNEYS.

No. 664.799. Patented Dec. 25, I900..

F. A. WHEELER. f

CAR WHEEL ROLLING MILL.

(Application filed Nov. 15, 1899.)

(No Model. l5 Sheefa$heef 14.

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No. 664,799. Pat nted De'c. 251900,

F. A. WHEELER. CAR WHEEL ROLLING HILL Application filed Nov. 15, 1899.} (No Mp'del.) l5 Sheets-Sheet l5.

QM W

WKTNESSES {NVEN'TOR umm- ATTORNEYS.

urua. wpumd'rou n c Nrrnn STATES PATENT OFFICE,

FRANK A. WHEELER, OF PITTSBURG, PENNSYLVANIA;

CAR-WHEEL-ROLLING MILL.

SPECIFICATION forming art of Letters Patent No. 664,799, dated December 25, 1906.

Application filed NOVBmbeI 15, 1899. Serial No. 737,026. (No model.)

To all whom, it may concern:

Be it known that I, FRANK A. WHEELER, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented certain new and useful Improvements in Rolling-Mill's, of which the following is a specification, reference being had therein to the accompanying drawings.

Myinvention relates to certain new and useful improvements in rolling-mills, and is particularly adapted for rolling circular shapes, such as car-wheels, car and locomotive wheel tires, pipe-flanges, &c.

The rolling-mill constructed in accordance with my invention involves a radical departure in its mode of operation and arrangement of'parts from the mills of this character heretofore used for rolling forged blanks, annular ingots, or blooms into circular shapes, car-wheels,and car and locomotive wheel tires.

One of the objects of my invention is to construct a mill of this character with a pair of adjustable rolls that while revolving will by means of suitable mechanism operate longitudinally toward each other and upon the inner face of the blank, ingot, or bloom, there by forming the requisite Web, plate, flange, or other internal shape which is desired in any circular shape, car-wheel, or tire.

A further object of my invention is to pro vide a mill of this class with a pair of removable rolls for forming the web, plate, flange, or otherinternal shape of a circular shape, car-wheel, or tire.

A further objectof my invention is to provide a mill of this class with a pair of interlocking rolls for forming the inner face of a circular shape, car-wheel, or tire.

A further object of my invention consists in constructing a mill of this character with a series of rolls which will completely form and finish the blank, ingot, or bloom into a circular shape, carwheel, or tire without changing any of the rolls during the process of rolling, thereby overcoming the objections heretofore existing in some mills or machines of this character and avoiding the use of independent roughing or blooming rolls previous to the finishing process.

A further object of myinvention is to provide liner-plates of different thicknesses which are adapted to be adjusted to one of the rolls forming the Web, plate, flange, or other internal shape on the inner face of a circular shape, carwheel, or tire. These liner-plates limit the lateral movement of the rolls toward each other and form the said web, plate, flange, or other internal shape of the desired thickness; furthermore, forming to all intents and purposes a solid roll and a bearing when the rolls are interlocked.

A still further object of myinvention is to construct and operate a mill or machine having a pair of rolls that while bearing upon and forming the inner faces of the rim of a car-wheel will at the same time bear upon and compress the web or plate in a lateral direction as regards the hub of said wheel, enough metal being provided in the web or plate as forged at the hammer or press to accommodate the expansion of the wheel-blank or bloom to the required diameter in that the said web or plate may be well worked by rolling and not drawn or attenuated, as would be the case if the web or plate of the wheelblank or bloom was forged or cast to finished size before rolling the blank or bloom to the required diameter. This feature of my invention is of particular importance and will be referred to farther on in this specification.

A further object of my invention is in the adaptation of a pair of improved edging-rolls for forming the edges of a circular shape, carwheel, or tire that my improved mill is adapted for, either or bothof said rolls being driven directly or frictionally,preferably both driven, and by any suitable means.

A further object of myinvention is to provide a pair of improved edging-rolls, one of which being fixed in immovable bearings in a carriage or frame which itself moves to accom modate the expanding circular shape, carwheel, or tire as rolled, while the other edging-roll operates radiallyin movable bearings suitably adjusted in an auxiliary carriage or frame in order to be adjusted to the varying widths of the object being rolled and while so adjusted is maintained in such a position that its axis is parallel, or practically so, with the axis of its mate during all or any part of the operation of reducing an ingot or bloom to the required width.

A further object of my invention is to provide a movable bearing for one of a pair of improved edging-rolls by installing said roll within the casting forming the hydraulic cylinder which operates to force said roll against one face of the circular shape, car-wheel, or tire that is being rolled, said cylinder forming, to all-intents and purposes, a guide to carry said roll, the plunger and piston of the cylinder being fixed and immovable.

A further object of myinvention is to provide a longitudinally adjustable pass or groove in the rolls used to form the web, plate,

flange, or other internal shape of a circular shape, car-wheel, or tire, said rolls while revolving being at the same time operated longitudinally toward each other by suitable power-motors, thereby decreasing the width of the pass or groove to the required distance and at the same time compressing or rolling a portion of the ingot or bloom contained therein to the required shape of the inner faces.

A further object of myinvention is to provide a pair of operating-shafts having adj ustably secured to one of their ends a pair of rolls which are removable and adjust-able longitudinally and adapted to form a web, plate,

flange, or other internal shape on the inner face of the circular shape, car-wheel, or tire, said rolls being also interlocking.

Briefly described, my invention consists in providing a mill of this character with a pair of interlocking, removable, and adjustable rolls adapted to form the desired web, plate, flange, or other internal shape on the inner face of a circular-shape, car-wheel, or tire, said rolls while revolving having a longitudinal movement toward each other, a roll for forming the periphery of a circular shape, carwheel, or tire, said roll while revolving having a longitudinal or vertical movement against the periphery of a circular shape, car-wheel, or tire, a pair of edging-rolls for forming the edge of a circular shape, car-wheel, or tire, one or two pairs of idler-rolls to guide the circular shape, car-wheel, or tire and keep it true and round, and means for operating said rolls simultaneously against theingot orbloomduring the process of forming the same into a circular shape, car-wheel, or tire.

With the above and other objects in view my invention consists in the novel combination and arrangement of parts hereinafter more fullydescribed, particularly pointed out in the claims hereunto appended, and illustrated in the accompanying drawings, wherein like numerals of reference indicate corresponding parts throughout the several views, and in which Figures 1 and 1 when taken together illustrate a side view of my improved mill. Fig. 1 is a side elevation of my improved mill. Fig. 2 is an end view thereof. Figs. 3 and 3 when taken together illustrate a top plan view of my improved mill. Fig. 4 is a detail end View showing a portion of the mill above the lines a a, Fig. 2. Fig. 5 is a vertical sectional view through the center of the mill. Fig. 6 is a longitudinal sectional view showing the edging-roll carriage or frame, the edging-rolls and their operating-shafts suspended therein, andthe auxiliary carriage or frame for the operating one of the edging-rolls. Fig. 7 is a top plan view of the edging-roll carriage or frame, showing the operatin -shafts for the rolls and the gearing for operating the same. Fig. 8 is a sectional view of the base-plate of the mill, showing the operating-cylinder for the main driven roll. Fig. 9 is a cross-sectional view showing the manner in which the edging-roll housings are connected to the entablature of the mill. Fig. 10 is a cross-sectional View showing the means for adjusting the guide-blocks for steadying or guiding the edging-roll carriage or frame. Fig. 11 is a side plan view of my improved rolls, showing a vertical section of a bloom or ingot arranged between the same with but one-half revolution made. Fig. 12 is a vertical sectional view of my improved rolls and a bloom or ingot ar-' ranged between the same when finished. Fig. 13 is a vertical sectional view of my improved roll and a bloom or ingot as entered in the same and one-half revolution made. is a vertical section of my improved rolls and a bloom or ingot arranged-between the same when finished. Fig. 15 is a cross-sectional view taken on the line m 56, Fig. 3 or Fig. 3. Figs. 16 and 16 when taken together are a side view of one of the operating-shafts and the supports and connections therefor, shown in section.

Referring to the drawings by reference-numerals, 1 and 2 indicate the operating-shafts for the web-rolls 3 and 4, which are adapted to form the fillet of the rim and the web of a car-wheel 5, as well as reduce said web to the required thickness. The inner end of each of the operating-shafts is provided with a substantially cone-shaped recess 6, in which is secured the cone-shaped extension orshank 7, formed integral with one side of each of Fig. 14

in suitable bearings 9 by means of the sleeves V 10, which are secured to the shafts by the keys 11. These keys 11 are arranged within a longitudinal groove formed in the shafts and the sleeves, which are in alinement with each other. By this arrangement the shafts 1 and 2 are permitted to move longitudinally within the sleeves.

The shafts l and 2 are revolved by means of the pinion 12, which is or may be formed integral with each of the sleeves 10 and which meshes with the intermediate gear 13 upon the counter-shaft 14, mounted in suitable bearings. The gear-wheel 13 meshes with the pinion 14 upon the shaft 16. This shaft is mounted in the bearings 17 and has secured to its outer end the coupling 18 for driving the same frictionally by a suitable power-motor independentof the main operating means, or it may be coupled thereto and driven directly. The result of this arrangement of operating means for the rolls 3 and 4 is that they revolve at the speed desired and which is determined by the requirements of the object to be rolled, a change of speed being necessary from one condition to another, as is understood by those familiar with the art. The bearings 9 are supported in suitable housings and have mounted between the same and the sleeves the babbitts or bushings 19.

By the arrangement of securing the shafts 1 and 2 within the sleeves 10 the same allows of a longitudinal movement while the shafts are revolving for the purpose of forcing the abu'ttingends of the shafts simultaneously together when suitably equipped with a working face such as is given thereto by the webrolls. The object of this movement is to compress the web, plate, or other internal shape of a circular shape, car-Wheel, or tire to the required thickness and to locate and fix the position of such internal shape as regards the outer face or periphery of the object to be rolled. To accomplish the longitudinal movement of the shafts 1 and 2, the same is obtained by connecting the outer end thereof to a suitable power-motor 20 or any other suitable appliance connected to the outer end of the shafts for obtaining such movement.

The power-motor 20, as shown, is provided with a suitable piston 21, connected at one face thereof to the piston-rod 22 and at its opposite face to the plunger-arm 23, which is connected, by means of the slidable coupling 24, to each operating-shaft. The coupling 24 is provided with the keys or fastening-pins 25 26, the key or pin 25 extending through one side of the coupling 24 and engaging in an annular groove 27, formed in the ends of each shaft, as shown. This allows for the revolving of the shaft. The key or pin 26 extends through one side of the coupling 24 and engages in a recess formed in the outer end of the plunger-arm. This secures the plunger-arm to the coupling and permits of longitudinally moving each of the operatingshafts. Arranged between the end of the shaft and the plunger-arm is a ball-race, in which is mounted the ball-bearings 28 for preventing friction. The key or pin '26 is somewhat smaller than the opening in the sliding coupling 24 to allow for a small play of the plunger-arm before moving the operating-shaft longitudinally. The coupling 24 is suitably supported by the bearing 29.

The outward movement of the shafts 1 and 2 is arrested by means of a shoulder 30, formed upon each of the shafts, and the inward movementof the shafts 1 and 2is arrested by means of the nut 31, mounted on the outer end of each piston-rod and engaging the annular flange 32 of the gland 33, abutting against the head 34 of the motor-cylinder. 35 indicat es a suitable packing for the piston-rod, and 36 a suitable hand or turn wheel for the stop-nut. By providing the end of the piston-rods with the stop-nut 31 the longitudinal movement of the working face of each shaft can be adjusted for regulating the rolling of the web or other internal shape to the desired thickness.

In adapting the mill for rolling such tire, pipe, flanges, or other circular shapes as are cylindrical internally and not in the form of disks, such as car-wheels, I provide a pair of interlocking rolls-for exam ple,as will be seen at 37 38, Figs. 13 and 14. Each of the rolls 37 38 is provided with a cone-shaped shank for securing the same in the inner end of the operating-shafts, forming thereby a shoulder 39, which abuts against the shafts, as shown. The Working face of the roll 37 has an annular recess 40 of a suitable depth. in which are adapted to be removably secured, by means of the set-screws 41, liner-plates 42 of the desired thickness. The roll 38 is provided on its working face with an annular projection or tenon 43 of less diameter than the roll, forming a shoulder 44. The projection 43 engages Within the annular recess 40 of the roll 37, and its movement is limited by means of the liner-plates 42, and arranged in the pne face of the projection is a recess 44, in which engages the head of the set-screw 41. By this arrangement of interlocking or removable rolls the inner face of a tire 45 is formed with the flange 46. (See Figs. 13 and 14.)

It will be observed that owing to the arrangement of the annular recess in the roll 37 and the mounting therein of different-sized liner-plates the thickness or section of the flange, Web, or other internal shape formed on the inner face of the tire or circular shape can be regulated as desired. Furthermore, during the operation of the rolls 37 38 the position of the flange, Web, or other internal shape relative to the edge of the object rolled and the movement of the rolls can be limited by the stop-nuts 3i, regulating the longitudinal movement of the operating-shafts.

The projection or tenon 43 of one roll operating within the annular recess of the opposite roll will prevent the rolls from being forced out of alinement by the pressure exerted by the main driven roll, to be hereinafter referred to, as the projection or tenon will act as a lock for the rolls, thereby making to all intents and purposes a solid roll with bearings ateach end and keeping the rolls in their true relative position While so interlocked.

It will be evident to those skilled in the art that not only can the most difficult forms of circular shapes, car-Wheels, or tires be rolled upon my improved mill with ease and readiness, as has heretofore been referred to, but ordinary car and locomotive wheel tires and circular shapes of plain or straight faced or straight taper-faced inner surface'or bore can easily be rolled by simply using a pair of interlocking rolls with a plain periphery. In such instances the rolls should be made so that the joint between them is at one side of the metal being worked and not hearing therein.

It is not intended to limit the construction of the operatingshafts so that their movement will be on the same general longitudinal line; but the said shafts may be set in suitable housings at any angle that will permit the longitudinal lines of the movement of the shafts to meet a common center.

47 denotes a roll for forming the periphery or tread of a circular shape, and which I term the tread-roll. This roll in mills of this character is known as the main roll, and as used in my improved mill is adapted to have a movement other than that of revolving as it du ring its revolution is forced against the ingot, bloom, or blank by a suitable power-motor, preferably hydraulic, as shown in Figs. 2 and 8, as at 48, the piston 49 of the motor being connected by its rod 50 operating through the motor-head 51 and the stuffing-box 52, the cylinder a8 being mounted at the center of the base-plate 53 of the mill.

The tread-roll a7 is provided with the necks 54, one of which is elongated and forming thereby an ordinary wabbler 55, to which is attached (not shown) a coupling-box and vibrating spindle, and the usual mill connections are employed (well known in the art) to connect the rolls with the main driving mechanism.

The tread-roll 47 is provided with the cradle 56, journaled and suitably fastened thereto. This cradle 56 has the piston-rod 50 connected to its lower face. This allows of the tread roll being forced against the ingot, bloom, or blank which encircles the web-rolls, thereby causing a reduction of the object rolled and enlarging it in diameter.

57 and 58 indicate my improved edgingrolls for rolling the edges of the circular shapes, car-wheels, and tires. 57 indicates the back and 58 the front edging-roll.

59 indicates the operating-shaft for the roll 57, and 60 the operating-shaft for the roll 58, and the lower ends of these shafts are provided with a substantially cone-shaped recess in which is secured the cone-shaped shank 61 of the rolls 57 58. (See dotted lines, Fig. 5.) By forming the shank 61 upon the edgingrolls a shoulder is formed which abuts against the lower end of the shafts 59 60. This construction is the same as heretofore referred to in connection with the operating shafts 1 and 2 and the web-rolls and permits the edging-rolls to be removable or detachable to or from their operating-shafts.

The shaft 59 for the edging-roll 57 while revolving operates within suitable radial bearings 62, fixed within a movable carriage or frame 63. (See Fig. 6.)

The shaft 60 for the edging-roll 58 while revolving operates within suitable radial bearings 64, fixed within a movable housing 65, which is arranged and guided within the carriage or frame 63, the housing having an independent movement of the carriage or frame 63 at right angles to the same and perpendicular to the shaft 60, to which is attached the roll 58.

The shaft 59 for the roll 57 has no radial movement and is intended to take the thrust of the shaft 60 with the roll 58 while the edges of the ingot, bloom, or blank are being reduced to the required width. The radial movement of the shaft 60 and the roll 58 is adapted to direct the pressure exerted by the roll 58 upon the edges of the object being rolled, and such radial movement is obtained by the auxiliary housing or frame 65 operated in a suitable manner. This housing or frame 65 has arranged therein a suitablehydraulic motor 66, having a piston 67 operating therein and connected by the rod 68 to a thrust-plate 69, suitably secured in one end of the carriage or frame 63.

The housing or frame 65 is rectangular in contour to prevent the same from turning in the carriage or frame, which is provided in its top, at one side thereof, with an opening 70, through which projects the upwardly-extending guide 71, formed integral with the carriage or housing 65.

The thrust-plate 69 is so secured in the end of the carriage 65 as to allow of an easy withdrawal thereof when desired for removing the auxiliary carriage or housing 65 from the carriage or frame 63.

72 indicates a stop for limiting the movement of the carriage or housing 65 by its motor 66, so that the width of the object being rolled between the edging-rolls 57 58 will be as desired. This method of operating one of the edging-rolls in a mill of this character is novel and has a distinct advantage over the former construction used in mills of this class, more specifically in that the movable edgingroll, such as 57, operates at all times in the same radial lines and at right angles to the surface being rolled, thereby avoiding distortion of the section of the object being rolled, as is caused by similar rolls moving to their work in constantly-changing lines of force.

The edging-roll shafts are supported in thrust-bearings, preferably ball or roller bearings 73, mounted in the slides 74 on the top of the carriage or frame 63. The use of such thrust-bearings removes all lateral pressure from the ends ofthe radial bearings 62 64 and 7 1 7' tends to lessen friction and heating of the edging-roll-shaft bearings than is now the case.

In mills of this character heretofore but one of the edging-rolls has been driven directly from the main operating means and that one corresponding to the roll 57, the op- IOO IIO

posite edging-roll being an idler-roll, In my improved mill itis preferred to havcboth rolls driven directly or frictionally, either coupled together and both run at the same speed or each roll driven independently, which is preferred and accomplished by means of the electric motors 76, connected to a suitable source of electric supply. The motor-shaft 77 of the motor 75 is journaled at its lower end in the top of the carriage or frame 63 and at its upper end in the spider 78, while the motor-shaft 79 of the motor '76 is slida-bly journaled at its lower end in the guide '71 of the auxiliary carriage or housing 65 by means of the step-bearing 80 and at its upper end journaled in the spider 82. The motor-shaft 77 is provided with a pinion 81, meshing with the intermediate gear 82, suitably supported by the carriage or frame 63 and which in turn meshes with the gear-wheel 83, mounted upon the edging-roll shaft 59. The upper end of the shaft 59 is jonrnaled in the spider 78, as shown. The motor-shaft 79 is provided with a pinion Si, meshing with an intermediate gear 85, slid-ably supported by the guide 71 of the auxiliary carriage 65 and which in turn meshes with the gear-wheel 86, mounted upon the edging-roll shaft 60. The upper end of the shaft 60 is jourualed in the spider 82, as shown. The ends of the spider 78 are connected to the stud orsupport 87, formed integral with the end of the carriage or frame 63, while the end of the spider S2 is connected to the stud or support 88, formed integral with the end of the auxiliary frame or housing 65.

The arrangement of edging-rolls and the operating means therefor will be found more satisfactory than the arrangement of and operating means for the edging-rolls heretofore in use, wherein one of the two edging-rollsis driven direct from the main operating means, for while the main driven roll is new and of standard diameter and calculated to impart uniform speed to the said edging-roll, yet in practice it is not. possible to always maintain such uniform speed because of the wearing of the rolls necessitating turning down and a consequent red notion in diameter. It is advantageous on the score of economical operation to be able to use all the rolls of a mill until completely worn out.

It is evident that if the rolls vary from the standard in a mill for rolling circular shapes the object being rolled will either run too fast or too slow for the edging-rolls and a slipping action is caused thereby that will either score the surface or distort or cobble the object rolled. In the manner of operating the edging-rolls as heretofore referred to it is evident thatby means of aproperly-devised table of the relative speeds of the rolls referred to a sufficient speed can be imparted to the electric motors and to said rolls which will follow the speedof the ingot, bloom, or blank being rolled to the effect that no slipping action will take place.

To compensate for the varying speed of the main operating means or power-motor driving the main roll, an automatic device of any ordinary construction (not shown) is ar ranged to govern the relative speeds between said operating means for the main roll and the electric motors driving the edging-rolls. To accommodate the expanding diameter of the ingot during the operation of rolling either longitudinally or vertically, I provide a series of hydraulic cylinders 89 of equal power, which are suitably supported in the manner shown and have their plungers 90 connected to the lugs 91, formed integral with the carriage or frame 63, as shown at 92.

The manner of guiding the carriage or frame 65 within the housings 93 consists of a series of guide-blocks 94, provided with V-shaped teeth 95, meshing with correspondingly-.

shaped grooves 96in the carriage or frame 63. The guide-blocks fit within grooves 96 (see Fig. 10) in the housings 93, as shown, and have their backs tapered in order that they may be forced down to take up the wear on the teeth or to line up the carriage to its true center. The method of adjusting these guide-blocks is shown in Fig. 10 by means of the bolt 97 and guide 98.

To guide the ingot, bloom, or blank in a mill of this class and keep it true and round, the usual idler guide-rolls well known in the art are provided and as many may be used as desired; but preferably four are employed, a pair of which are termed the upper guide-rolls 99 100, jourualed in the brackets 101 and'102, and the remaining pair 103 104C, called the lower guide-rolls, journaled in the brackets 104' 105. Referring to the drawings, it will be seen that the rolls 99 and 100 are set at a uniform distance from the edgingrolls 57 58 and that the rolls 103 and 104 are set at a uniform distance from the web and tread rolls. The brackets for the upper guiderolls are each connected to the carriage or frame 63 and move therewith,wl1ile the brackets for the lower guide-rolls are each connected to a slide-block 106, arranged in the housings, as shown. (See Fig. 5 of the drawings.) These blocks are each provided with a screw 107, which is adapted to move the blocks and lower guide-rolls longitudinally within the housings by means of a suitable gearing and suitably coupled together by an ordinary counter-shaft, to the edectthat both lower guide-rolls are advanced or retired at will within the housings. Power is transmitted to the counter-shaft by a suitable friction-clutch or electric motor. (Not shown.)

The frame for my improved mill consists of the intermediate base or bed plate 53, the floor-line of the mill being on a plane through said bed-plate, about the center thereof. This bed or base plate has a vertical opening through its center in which the tread-roll, lower guide-rolls, and webrolls operate upon the object being rolled. Within this base or bed plate 53 are the housings 108 for the operating-shafts and the housings 109 for the lIO 

